Stacked storage tanks



FIG. 1 is a perspective view of stacked storage tanks showing my new design;

FIG. 2 is a side view of the stacked storage tanks of FIG. 1;

FIG. 3 is a front view of the stacked storage tanks of FIG. 1;

FIG. 4 is a bottom view of the stacked storage tanks of FIG. 1;

FIG. 5 is a back view of the stacked storage tanks of FIG. 1;

FIG. 6 is a side view of the stacked storage tanks of FIG. 1; and,

FIG. 7 is a top view of the stacked storage tanks of FIG. 1. 

The ornamental design for stacked storage tanks, as shown and described. 